The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1998
Filed:
Jan. 02, 1997
Applicant:
Inventor:
Giuseppe Bocchi, Parma, IT;
Assignee:
ESAM S.P.A., Parma, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415 551 ;
Abstract
The invention relates to an improved suction and blowing machine comprising an impeller provided with blades which rotate internally of an annular channel afforded in a body. The annular channel comprises a first tract having a transversal section which is greater than that of the blades, and is constituted by two communicating semichannels. The annular channel extends from an intake mouth to a delivery mouth and is provided with a peripheral wall facing external peripheral edges of the blades which peripheral wall bears a cusp-section projecting element extending over an entire length of the first tract of the peripheral wall and creates thereon two concave surfaces.